Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '091c3934760123a0433dda329503a62a6833d5d83c437da8ed45270c97a8087c' 
  AND token = 'F7FlZJcSsUnsW8SE/1nzZBJW9Aq+Idly95DIg/gviN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}